net/netfilter/nf_conntrack_netlink.c

228 	struct nf_conntrack_helper *helper;
234 	helper = rcu_dereference(help->helper);
235 	if (!helper)
241 	if (nla_put_string(skb, CTA_HELP_NAME, helper->name))
244 	if (helper->to_nlattr)
245 		helper->to_nlattr(skb, ct);
1933 	struct nf_conntrack_helper *helper;
1943 	/* don't change helper of sibling connections */
1945 		/* If we try to change the helper to the same thing twice,
1952 			helper = rcu_dereference(help->helper);
1953 			if (helper && !strcmp(helper->name, helpname))
1962 		if (help && help->helper) {
1963 			/* we had a helper before ... */
1965 			RCU_INIT_POINTER(help->helper, NULL);
1972 	helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
1974 	if (helper == NULL) {
1980 		if (rcu_access_pointer(help->helper) == helper) {
1981 			/* update private helper data if allowed. */
1982 			if (helper->from_nlattr)
1983 				helper->from_nlattr(helpinfo, ct);
1988 		/* we cannot set a helper for an existing conntrack */
2247 	struct nf_conntrack_helper *helper;
2267 		helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
2269 		if (helper == NULL) {
2272 			if (request_module("nfct-helper-%s", helpname) < 0) {
2278 			helper = __nf_conntrack_helper_find(helpname,
2281 			if (helper) {
2297 			/* set private helper data if allowed. */
2298 			if (helper->from_nlattr)
2299 				helper->from_nlattr(helpinfo, ct);
2301 			/* disable helper auto-assignment for this entry */
2303 			RCU_INIT_POINTER(help->helper, helper);
2643 		       struct nf_conntrack_helper *helper,
2872 	struct nf_conntrack_helper *helper = NULL;
2889 		helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
2891 		if (helper == NULL)
2896 				     helper, &tuple, &mask);
2996 	b = (unsigned long)exp->helper;
3060 		struct nf_conntrack_helper *helper;
3062 		helper = rcu_dereference(help->helper);
3063 		if (helper &&
3064 		    nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name))
3377 	struct nf_conntrack_helper *helper;
3383 	helper = rcu_dereference(m_help->helper);
3384 	if (!helper)
3387 	return strcmp(helper->name, name) == 0;
3513 		       struct nf_conntrack_helper *helper,
3526 	if (cda[CTA_EXPECT_CLASS] && helper) {
3528 		if (class > helper->expect_class_max)
3556 	exp->helper = helper;
3581 	struct nf_conntrack_helper *helper = NULL;
3610 		helper = __nf_conntrack_helper_find(helpname, u3,
3612 		if (helper == NULL) {
3615 			if (request_module("nfct-helper-%s", helpname) < 0) {
3620 			helper = __nf_conntrack_helper_find(helpname, u3,
3622 			if (helper) {
3633 	exp = ctnetlink_alloc_expect(cda, ct, helper, &tuple, &mask);